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Nonlinear numerical model in r/c bridges analysis (CROSBI ID 519528)

Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija

Trogrlić, Boris ; Mihanović, Ante Nonlinear numerical model in r/c bridges analysis // Proceedings of the International Conference on Bridges / Radić, Jure (ur.). Dubrovnik: Structural Engineering Conference (SECON) and Croatian Society of Structural Engineers (CSSE), 2006. str. 399-406

Podaci o odgovornosti

Trogrlić, Boris ; Mihanović, Ante

engleski

Nonlinear numerical model in r/c bridges analysis

This paper presents a numerical model for failure analysis of reinforced-concrete bridges under a monotonically increasing load, from zero up to the ultimate load, i.e. collapse of the structure. The collapse of the structure occurs due to exceeding the limit load and/or losing of stability of space beam elements or whole structure. In general, the developed model describes material and geometric nonlinear behaviour of space beam structures of composite cross sections (pure R/C or combined with steel cross sections). Material nonlinearity is based on uniaxial constitutive law for materials in composite cross section what is, from engineer point of view, practical and more acceptable than constitutive law in 3D. Presented model also covers non-uniform torsion of 3D beam element in case of nonlinear behaviour of composite cross-sections. The equilibrium of the system on deformed geometry is achieved by the model of geometric nonlinearity according to Total Lagrange formulation with small displacements. Thereby, the loss of stability due to buckling caused by bending, torsional buckling and lateral buckling of the space beam element may occur. Discretization of numerical model is multi-level, as follows: global discretization on two-node beam element with 6 degrees of freedom per node ; fiber discretization of composite cross-section, and 3D discretization in order to describe non-uniform torsion but element by element in calculation of global stiffness matrix. Finally, two examples are studied to verify the accuracy of the program and demonstrate its application in practical bridge engineering.

R/C bridges; material nonlinearity; geometric nonlinearity; failure analysis

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Podaci o prilogu

399-406.

2006.

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objavljeno

Podaci o matičnoj publikaciji

Proceedings of the International Conference on Bridges

Radić, Jure

Dubrovnik: Structural Engineering Conference (SECON) and Croatian Society of Structural Engineers (CSSE)

Podaci o skupu

International Conference on Bridges

predavanje

01.01.2006-01.01.2006

Dubrovnik, Hrvatska

Povezanost rada

Građevinarstvo